Centimeter-level high-solid-phase leaking stoppage slurry mixed transportation leaking stoppage equipment

Abstract

The centimeter-level high-solid-phase leaking stoppage slurry mixed transportation leaking stoppage equipment comprises a slurry preparing system, a stirring system, a liquid storage tank, an electric control cabinet and a pumping system which are installed on a skid-mounted base, the slurry preparing system, the liquid storage tank and the pumping system are all communicated, the stirring system is arranged in the liquid storage tank, and bag breaking devices are arranged above the slurry preparing system and the liquid storage tank; the stirring system comprises a mechanical stirring device and a pneumatic stirring device, and the slurry preparing system, the stirring system and the pumping system are all in electric signal connection with the electric control cabinet. The utility model adopts a skid-mounted structure. The bottom of the liquid storage tank adopts a conical inclined surface, the mixing funnel and the suction inlet of the stepless speed change output pump are adjacent to the lowest end of the conical inclined surface, and the non-stick coating is matched, so that the utilization rate of the leaking stoppage slurry is up to 96% or above, and the tank bottom almost has no residue and is easy to clean. Mechanical stirring and pneumatic stirring are combined, rapid mixing and stirring of the leaking stoppage material are achieved, the stirring efficiency is greatly improved, and precipitation of the leaking stoppage material is reduced to the maximum extent while it is guaranteed that leaking stoppage slurry is homogenized and dispersed.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and natural gas drilling equipment, and in particular relates to centimeter-level high-solid-phase plugging slurry mixed transmission plugging equipment. Background Art

[0002] The underground complexity that cannot be avoided in the field of vicious well leakage drilling is likely to cause well collapse, or even vicious accidents such as drill sticking and blowout, if the efficient and rapid treatment of well leakage cannot be achieved quickly, resulting in huge economic losses, accompanied by vicious accidents such as environmental protection and life safety. The most efficient and quickest treatment method for vicious well leakage is to use large-particle high-solid phase plugging slurry for special plugging, but the existing drilling equipment cannot realize the preparation and pumping of large-particle (centimeter-level material) high-solid phase plugging slurry. After the occurrence of vicious well leakage, only the drilling fluid circulation system can be relied on to complete the preparation and pumping of fine-particle (<1cm) plugging slurry, and the plugging effect is not ideal.

[0003] After a serious well leakage occurs, it is difficult for existing drilling equipment to prepare and pump centimeter-level high-solid plugging slurry. The main problems are as follows: (1) The overall structure of the existing drilling fluid circulation process is complex, generally 6-8 circulation tanks, tank-to-tank pipelines connected to the tank, slurry pipelines connected to the tank, drilling pump water pipelines connected to the tank, and up to 10 groups of pipelines. When preparing plugging slurry in a single tank, there are factors such as running, slurry, dripping, leakage, and channeling, which lead to the prepared plugging slurry being contaminated and the plugging effect is poor; (2) When preparing large-particle high-solid plugging slurry, it is difficult to add plugging materials and the technical problem of low slurry preparation efficiency greatly increases the plugging time; (3) The water supply pipelines of some drilling pumps are too long. Due to the high viscosity and poor fluidity of centimeter-level high-solid plugging slurry, the drilling pump cannot suck in the plugging slurry and cannot pump the plugging slurry into the leaking layer.

[0004] Patent 201721713270.2 discloses a plugging slurry preparation tank, including a base, a tank body and a slurry preparation and feeding system, wherein the tank body and the slurry preparation and feeding system are both arranged on the base, an agitator is arranged in the tank body, a tank surface inlet is opened on the upper part of the tank body, and a tank cleaning outlet is opened on the tank body; the slurry preparation and feeding system is located on one side of the tank body, and the slurry preparation and feeding system includes a cable box, a feeding funnel and a weighting pump, the power supply of the equipment in the cable box is connected to the feeding funnel and the weighting pump through a cable, the weighting pump is connected to the liquid inlet of the preparation tank of the tank body through an inlet pipeline, the weighting pump is connected to the feeding funnel through a connecting pipeline, and the weighting pump is connected to the liquid outlet of the preparation tank of the tank body through an outlet pipeline. The plugging slurry can be prepared conveniently and quickly and effectively utilized. However, there are the following problems:

[0005] (1) The preparation tank adopts a cube design, the suction port of the drilling pump is high, the residual volume in the tank is greater than 25%, and the utilization rate of the prepared plugging slurry is low, which increases the special plugging cost; (2) The preparation tank has two double-layer slurry agitators. When the tank volume exceeds 30 cubic meters, the existing stirring capacity is difficult to meet the stirring requirements of large-particle high-solid phase plugging slurry, resulting in the precipitation of the prepared large-particle plugging material and poor stability of the plugging slurry; (3) The valve and valve seat of the pump adopt a surface contact structure design, which leads to frequent blocking of large-particle high-solid phase plugging slurry and difficulty in pumping into the leaking layer. Utility Model Content

[0006] The purpose of the utility model is to provide a centimeter-level high solid-phase plugging slurry mixed transmission plugging equipment to overcome the above-mentioned technical problems existing in the prior art.

[0007] To this end, the technical solution provided by the utility model is as follows:

[0008] A centimeter-level high solid phase plugging slurry mixed delivery plugging equipment, comprising a slurry preparation system, a stirring system, a liquid storage tank, an electric control cabinet and a pumping system installed on a skid-mounted base, wherein the slurry preparation system, the liquid storage tank and the pumping system are all connected, the stirring system is arranged in the liquid storage tank, and a bag breaker is arranged above the slurry preparation system and the liquid storage tank;

[0009] The stirring system comprises a mechanical stirring device and a pneumatic stirring device, and the slurry mixing system, the stirring system and the pumping system are all connected to the electric control cabinet by electrical signals.

[0010] The slurry mixing system includes a mixing pump and a mixing funnel, the mixing pump is connected to the mixing funnel, the mixing pump is connected to the liquid storage tank through a funnel suction pipeline, the funnel suction pipeline is arranged at the bottom of the liquid storage tank, the outlet of the mixing funnel is respectively connected to the funnel output pipeline and the perfusion pipeline through a three-way valve, the funnel output pipeline is arranged in the middle of the top of the liquid storage tank, the perfusion pipeline is connected to the pumping system, the pumping system is connected to the liquid storage tank through the output pump suction pipeline, and the output pump suction pipeline is arranged at the bottom of the liquid storage tank.

[0011] The mechanical stirring device is an adjustable speed stirrer, and the pneumatic stirring device includes a hose, an in-tank air pipeline line 1 and an in-tank air pipeline line 2. The in-tank air pipeline line 1 is circumferentially arranged along the inner wall of the liquid storage tank, and a plurality of three-way valves are evenly distributed on the in-tank air pipeline line 1. The outlet of the three-way valve is connected to the in-tank air pipeline line 2. The in-tank air pipeline line 2 corresponds to the in-tank air pipeline line 2 in one to one. One end of the hose is connected to the in-tank air pipeline line 1, and the other end of the hose is connected to an air compressor.

[0012] The liquid storage tank has a conical inclined surface symmetrically arranged along the axis, and the space between the conical inclined surface and the tank body is filled with weighted sand. The tank surface of the liquid storage tank adopts a polyurethane grid and is equipped with a liquid level scale.

[0013] The pumping system comprises a continuously variable speed output pump and a motor, wherein the motor is fixed on the upper part of the continuously variable speed output pump, and the continuously variable speed output pump and the liquid storage tank are connected through an output pump suction pipeline.

[0014] A ladder is installed on the side of the liquid storage tank, a steel plate support beam is provided on the top of the liquid storage tank, a guardrail is provided on the steel plate support beam, and a cantilever crane is provided on one side of the slurry mixing system.

[0015] The valve of the stepless speed-variable output pump is spherical, made of wear-resistant, pressure-resistant rigid material, and the valve seat is made of highly elastic and wear-resistant polyurethane material.

[0016] The beneficial effects of the utility model are:

[0017] The centimeter-level high-solid-phase plugging slurry mixed transmission plugging equipment provided by the utility model integrates the slurry preparation system, mixing system, pumping system, electric control cabinet, and liquid storage tank onto a skid-mounted base, reducing the well site footprint by 400%. The control system is integrated into a control panel, and each system can realize independent and coordinated operation, which is easy to operate and has a high safety factor. The bottom of the liquid storage tank adopts a conical slope, and the suction port of the mixing funnel and the stepless speed output pump are close to the lowest end of the conical slope. Combined with a non-stick coating, the plugging slurry utilization rate is as high as more than 96%, and there is almost no residue at the bottom of the tank, which is easy to clean. The two methods of mechanical stirring and pneumatic stirring are combined to achieve rapid mixing of plugging materials, greatly improve the stirring efficiency, ensure the homogeneous dispersion of the plugging slurry, and minimize the precipitation of the plugging materials.

[0018] The mixed transmission plugging equipment is completely separated from the drilling fluid circulation system and independently performs special plugging operations, effectively ensuring the stability of the plugging slurry. It eliminates the problem of the plugging slurry being contaminated as a whole due to poor sealing or misoperation of the drilling fluid circulation tank during the preparation of the plugging slurry, which affects the plugging effect. It can meet the construction needs of multiple types of plugging slurries such as gels, curables, and inert bridge plugs, minimize the preparation time of plugging slurry, reduce the residual amount of plugging slurry, and greatly improve the effectiveness of special plugging. The valve inclined surface structure of the continuously variable output pump is changed to a ball line structure, which greatly reduces the contact area during the pumping of the plugging slurry, and is not prone to signs of jamming. It can prepare and pump high-solid plugging slurry containing 40mm particles to achieve rapid treatment of large fractures and malignant leakage wells.

[0019] The utility model adopts a mixing funnel jet to add materials to the liquid storage tank, cooperates with a cantilever crane and a bag breaker, and adopts a tank surface bag breaking type feeding method to achieve safe and portable addition of ton-bag type plugging materials, improve the slurry preparation efficiency, and increase the feeding efficiency by more than 35%, greatly saving the plugging slurry preparation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a top view of an implementation method of the utility model;

[0021] Figure 2 It is a side view of an embodiment of the utility model.

[0022] In the figure: 1. Mixing funnel; 2. Mixing pump; 3. Cantilever crane; 4. Adjustable speed agitator; 5. Gas pipeline in the tank; 6. Feeding port on the tank surface; 7. Steplessly variable speed output pump; 8. Output pump pressure relief valve; 9. Funnel suction pipeline; 10. Output pump suction pipeline; 11. Funnel output pipeline; 12. Filling pipeline; 13. Guardrail; 14. Ladder; 15. Electric control cabinet; 16. Lighting. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0024] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0025] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0026] Example 1

[0027] The utility model provides a centimeter-level high solid phase plugging slurry mixed transmission plugging equipment, including a slurry mixing system, a stirring system, a liquid storage tank, an electric control cabinet 15 and a pumping system installed on a skid-mounted base, wherein the slurry mixing system, the liquid storage tank and the pumping system are all connected, the stirring system is arranged in the liquid storage tank, and a bag breaker is arranged above the slurry mixing system and the liquid storage tank;

[0028] The stirring system includes a mechanical stirring device and a pneumatic stirring device. The slurry mixing system, the stirring system and the pumping system are all connected to the electric control cabinet 15 via electrical signals.

[0029] The utility model integrates the slurry mixing system, the mixing system, the pumping system, the electric control cabinet 15, and the liquid storage tank onto a skid-mounted base, reducing the well site area by 400%. The control system is integrated into a control panel, and each system can realize independent operation and coordinated operation, which is easy to operate and has a high safety factor.

[0030] Example 2

[0031] Based on Example 1, this example provides a centimeter-level high solid phase plugging slurry mixed transmission plugging equipment, such as Figure 1 As shown, the slurry preparation system includes a mixing pump 2 and a mixing funnel 1, the mixing pump 2 is connected to the mixing funnel 1, the mixing pump 2 is connected to the liquid storage tank through the funnel suction pipeline 9, the funnel suction pipeline 9 is arranged at the bottom of the liquid storage tank, the outlet of the mixing funnel 1 is respectively connected to the funnel output pipeline 11 and the perfusion pipeline 12 through a three-way valve, the funnel output pipeline 11 is arranged in the middle of the top of the liquid storage tank, the perfusion pipeline 12 is connected to the pumping system, the pumping system is connected to the liquid storage tank through the output pump suction pipeline 10, and the output pump suction pipeline 10 is arranged at the bottom of the liquid storage tank.

[0032] Mixing funnel 1 for slurry preparation and directly adding plugging materials into the liquid storage tank for slurry preparation. These two slurry preparation methods can prepare plugging slurry at the same time or independently. Select according to the characteristics of the plugging material. For example, viscous plugging materials are prepared by mixing funnel 1, and non-agglomerated plugging materials are prepared by directly adding them into the tank surface. The specific working process is as follows:

[0033] Mixing funnel 1 slurry preparation:

[0034] The mixing pump 2 draws drilling fluid from the liquid storage tank and enters the liquid storage tank through the mixing funnel 1. The bag breaker is installed on the upper part of the mixing funnel 1 and is portable and detachable. The ton bag is cut by the four-sided pyramid bag breaker to allow the plugging material to enter the mixing funnel 1. The preparation of centimeter-level high-solid phase plugging slurry is completed through the jet action of the mixing funnel 1.

[0035] Liquid storage tank slurry:

[0036] A tank surface feeding port 6 is provided on the top of the liquid storage tank. The bag is broken by the bag breaker above the liquid storage tank, and the plugging material enters the liquid storage tank through the tank surface feeding port 6 to complete the tank surface feeding operation of the liquid storage tank. There is a three-way gate at the output end of the mixing funnel 1, which can be diverted to the liquid storage tank for plugging slurry preparation, and can also be supplied to the pumping system through the perfusion pipeline 12 to ensure the water supply efficiency of the pumping system. The perfusion pipeline 12 is provided with an output pump pressure relief valve 8.

[0037] The motor of mixing pump 2 is 55KW, the flow rate is >100m³ / h, the suction pipeline is a 6-inch pipeline, one end of the funnel suction pipeline 9 is connected to the inlet of mixing pump 2, and the other end is at the bottom of the liquid storage tank, 10cm away from the bottom of the tank; one end of the funnel output pipeline 11 is connected to the outlet of mixing funnel 1, and the other end is in the middle of the top of the liquid storage tank. The drilling fluid is sucked from the lowest point in the liquid storage tank and returned to the liquid storage tank through the jet funnel.

[0038] Example 3

[0039] On the basis of Example 1, this embodiment provides a centimeter-level high-solid-phase plugging slurry mixed transportation plugging equipment, the mechanical stirring device is an adjustable-speed stirrer 4, the pneumatic stirring device includes a hose, an in-tank air pipeline 1 5 and an in-tank air pipeline 2, the in-tank air pipeline 1 5 is arranged circumferentially along the inner wall of the liquid storage tank, and a plurality of three-way valves are evenly distributed on the in-tank air pipeline 1 5, the outlet of the three-way valve is connected to the in-tank air pipeline 2, the in-tank air pipeline 2 and the in-tank air pipeline 2 correspond one to one, one end of the hose is connected to the in-tank air pipeline 1 5, and the other end of the hose is connected to an air compressor.

[0040] In this embodiment, if Figure 2 As shown, there are two adjustable speed agitators 4, which are installed on both sides of the center of the liquid storage tank. The adjustable speed agitator 4 has three layers of blades, and the stirring speed is adjustable from 0 to 100 r / min. Each layer of impeller has 4 blades, with a length of 30 cm, which are welded on the continuously variable speed agitator bearing at a 45° angle. The continuously variable speed agitator shaft is 10 cm away from the bottom of the tank. The end of the continuously variable speed agitator shaft is protected by a positioning protective sleeve to reduce the deflection of the stirring shaft due to excessive stirring resistance and increase the service life of the agitator.

[0041] Pneumatic stirring, the air source is a 0.7Mpa air compressor, the output end is a hose, and the tank gas pipeline line 15 (hollow hard pipe) is installed along the tank surface. 8 three-way valves are evenly distributed on the tank gas pipeline line 15, and each three-way valve is installed with a vertical tank gas pipeline line 2 (hollow hard pipe) that fits the inner wall of the tank. After the air compressor works normally, the compressed air is sent to the 8 three-way gates through the hose and the tank gas pipeline line 15. The switch is selected according to the preparation requirements of the on-site plugging slurry. The 8 vertical tank gas pipeline lines 2 can supply air at the same time or separately.

[0042] Mechanical stirring and pneumatic stirring can work simultaneously or independently, and can be selected according to the consistency of the centimeter-level plugging slurry.

[0043] Example 4

[0044] Based on Example 1, this example provides a centimeter-level high-solid-phase plugging slurry mixed transmission plugging equipment, the liquid storage tank has a conical slope symmetrically arranged along the axis, the conical slope and the tank body are filled with weighted sand, the tank surface of the liquid storage tank adopts a polyurethane grid and is equipped with a liquid level scale.

[0045] In this embodiment, the liquid storage tank is 5m*2.5m*2.6m, and the effective volume is 32.5m³. The tank adopts a conical slope design, the vertical height of the conical slope is 30cm, the drain port is connected to the lowest end of the conical slope, and the cavity between the conical slope and the tank body is filled with weighted sand according to the overall lifting balance requirements. The tank surface adopts a polyurethane grid design, each grid is 0.8m*0.8m*0.05m, and is supported by the supporting steel beams of the tank body, with a load-bearing capacity of ≥5 tons.

[0046] Example 5

[0047] On the basis of Example 2, this embodiment provides a centimeter-level high-solid phase plugging slurry mixed transmission plugging equipment, the valve of the stepless speed output pump 7 is spherical, made of wear-resistant and pressure-resistant rigid material, and the valve seat is made of highly elastic and wear-resistant polyurethane material.

[0048] The valve slope structure of the continuously variable output pump 7 is changed to a ball-line structure, which greatly reduces the contact area during the plugging slurry pumping process, is less likely to show signs of jamming, and eliminates signs of jamming and deflection when pumping centimeter-level high-solid plugging slurry. After completing the normal pumping of centimeter-level high-solid plugging slurry, high-solid plugging slurry containing 40mm particles can be prepared and pumped, thereby achieving rapid treatment of large fractures and malignant leakage wells.

[0049] Example 6

[0050] Based on Example 4, this example provides a centimeter-level high-solid-phase plugging slurry mixed plugging equipment, the pumping system includes a continuously variable speed output pump 7 and a motor, the motor is fixed on the upper part of the continuously variable speed output pump 7, and the continuously variable speed output pump 7 and the liquid storage tank are connected through the output pump suction pipeline 10.

[0051] like Figure 2 As shown, the pumping system is mainly connected by a motor, a continuously variable output pump 7 and its output pipeline. The motor is installed on the upper part of the continuously variable output pump 7 through a fixed bracket. The motor power is 164KW when running at full load. The hydraulic end of the continuously variable output pump 7 is parallel to the discharge port of the liquid storage tank. There is no obstruction when replacing the cylinder liner piston or other wearing parts, which reduces the occupied area of ​​the pumping system. The continuously variable output pump 7 is driven by the reduction box to operate normally. The continuously variable output pump 7 transports the prepared centimeter-level high solid phase to the riser of the drilling through a high-pressure pipeline, so that the plugging slurry enters the leaking layer and completes the injection of the plugging slurry.

[0052] The bottom of the liquid storage tank at the suction end of the stepless variable output pump can self-absorb the plugging slurry in the liquid storage tank after startup, and can also be replenished by a mixing funnel 1, which improves the water supply efficiency of the pump and reduces the residual amount of plugging slurry in the tank. The output pipeline of the stepless variable output pump 7 adopts a soft and hard pipeline, which is connected by a union, and the output end hose line is directly connected to the riser cementing cement head.

[0053] Example 7

[0054] Based on Example 5, this embodiment provides a centimeter-level high solid-phase plugging slurry mixed transportation plugging equipment, a ladder 14 is installed on the side of the liquid storage tank, a steel plate support beam is provided on the top of the liquid storage tank, a guardrail 13 is provided on the steel plate support beam, and a cantilever crane 3 is provided on one side of the slurry mixing system.

[0055] The cantilever crane 3 lifts the ton bag type plugging material to the tank surface. It adopts a telescopic structure design with a lifting weight of 3 tons. It is used to lift the ton bag type plugging material to achieve safe and fast material addition. The liquid level scale is installed on the tank surface of the liquid storage tank. The scale plate has the marking of the volume of the liquid in the liquid storage tank, which is convenient for directly reading the volume of the plugging slurry in the tank. The ladder 14 and the guardrail 13 are convenient for the staff to inspect and ensure safety. The guardrail 13 is also equipped with a lighting lamp 16.

[0056] On-site implementation application:

[0057] like Figure 1As shown, according to the overall structure diagram, the following are installed on the skid-mounted base from left to right: slurry mixing system, liquid storage tank, pumping system, and electric control cabinet 15. 1. The 1000×2400×210mm skid-mounted base is equipped with hoisting and fixing functions to meet transportation requirements; 2. The mixing funnel 1 and the mixing pump 2 are placed in parallel, the cantilever crane 3 is installed next to the mixing funnel 1, and the detachable four-sided pyramid bag breaker is fixed above the feeding port of the mixing funnel 1; 3. The liquid storage tank is 5m*2.5m*2.6m, effective The volume is 32.5m³, and it is formed by seamless welding of 8mm steel plates. The inside of the tank adopts a conical slope design, and the vertical height of the conical slope is 30cm. The drain port is connected to the lowest end of the conical slope, and the conical slope and the cavity of the tank body are filled with weighted sand; 4. There is an 80mm steel plate support beam on the top of the tank, and a 0.8m*0.8m*0.05m polyurethane grid plate is laid flat. The tank surface feeding port is 6500mm×500mm, a four-sided pyramid bag breaker is installed, and a liquid level scale is installed. ; 5. Two three-blade adjustable speed agitators 4 are located on both sides of the center of the liquid storage tank; 6. An in-tank gas pipeline 1 5 is installed around the tank surface, and 8 three-way valves are distributed on the in-tank gas pipeline 1 5. Each three-way valve is installed with a vertical in-tank gas pipeline 2 that fits the inner wall of the tank and is 0.1m away from the bottom of the tank; 7. The suction port of the mixing funnel 1 is 10cm away from the bottom of the tank, and the corners of the pipeline are all arc conversions. One output end is close to the lower part of the tank surface and the output end is located in the center of the tank, and the other output end is connected to the stepless The suction pipeline connection of the variable speed output pump 7 can be used to supply liquid to the stepless variable speed output pump 7; 8. The hydraulic end of the stepless variable speed output pump 7 is parallel to the discharge port of the liquid storage tank, the suction end is 10 cm away from the bottom of the tank, and the pipeline corners are all arc conversions; 9. The electric control cabinet 15 is installed on the far right of the skid, and the control panel is 1.5 m away from the operating platform for easy operation; 10. The cable planning of the device is carried out in accordance with the on-site electricity standards; 11. All components are treated with C5-1 standard anti-corrosion paint.

[0058] Clean water trial run test:

[0059] 1. Hoisting test: use a 50-ton crane to lift the equipment 8m off the ground. The whole equipment is stable without tilt.

[0060] 2. For sealing test, fill the liquid storage tank with clean water, open all the switch gates in turn, observe whether there is water seepage, and let it stand for 1 hour. No water seeps out.

[0061] 3. Test the electrical control system, connect the power supply, and conduct a power-on test on all energized equipment to ensure that the equipment operates normally.

[0062] 4. Mixing system test, mechanical mixing: start the agitator after power on, less than 20r / min, run for 30 minutes, the agitator operates normally without abnormal noise, 80-100r / min, run for 30 minutes, the agitator operates normally without abnormal noise; pneumatic mixing test, turn on the air compressor, connect the conversion joint, supply air to the hollow steel pipe, test 8 pipelines in turn, ventilation is normal, and pneumatic mixing is achieved.

[0063] 5. Test the mixing funnel 1, open the suction valve and the output pipeline into the pipe, start the mixing pump 2, and the clean water passes through the mixing funnel 1 from the suction port and then enters the liquid storage tank. The operation is normal.

[0064] 6. Pumping system test: open the suction valve and the output valve, start the continuously variable output pump 7, and the clean water enters the output end from the suction port through the integrated mixing pump to realize the output of clean water; open the suction valve and the output pipeline entering the suction valve, start the mixing funnel 1, and the clean water passes through the mixing funnel 1 from the suction port and then enters the suction pipeline of the continuously variable output pump 7. The speed of the continuously variable output pump 7 ranges from 0-1000r / min and operates normally, thus completing the clean water test.

[0065] 7. After completing the water cleanliness test of a centimeter-level high-solid phase plugging slurry mixed transportation plugging equipment, the equipment stops running, 12.5 cubic meters of clean water are released, 0m³ of clean water is reserved in the tank, and a centimeter-level plugging slurry test is carried out.

[0066] Test of plugging slurry with 20mm content and 10% plugging agent.

[0067] 1) Preparation and pumping test of centimeter-level high-solid plugging slurry

[0068] The particle size of the plugging material is 2cm. ① Add 15 cubic meters of clean water into the tank, start the stirring system (mechanical stirring + pneumatic stirring), and after it runs normally, open the liquid inlet pipeline and the pipeline gate output to the liquid storage tank, start the mixing funnel 1, first add 4% white clay to the clean water, use the cantilever crane 3, and add 1.5 tons of 20mm particle size plugging material to the mixing funnel 1 and the tank surface feeding port 6 respectively. The equipment runs normally and the slurry preparation time is 3 minutes.

[0069] 2) Pumping plugging slurry test

[0070] ① After the plugging slurry is prepared, open the inlet valve and the output valve of the continuously variable output pump 7, start the continuously variable output pump 7, control the displacement at 0-22L / s, and stop the pump when the equipment operates normally. ② Open the valves of the inlet pipeline and the inlet pipeline output to the continuously variable output pump 7, start the mixing funnel 1, and pour the plugging slurry. When the equipment operates normally, all the plugging slurry in the tank is pumped out. The overall plugging slurry pumping time is 12 minutes, and the residual volume in the tank is 0.4 cubic meters. The residual plugging slurry enters the waste liquid tank through the discharge port.

[0071] Subsequently, according to the plugging requirements of the maximum particles of the plugging slurry on site, the plugging slurry test with a content of 20-40mm and 10-40% plugging agent was completed. All operations were normal, meeting the preparation and pumping requirements of the on-site vicious plugging slurry. The residual amount of slurry in the tank was ≤0.5m³, and there was no running, sloshing, dripping, or leakage.

[0072] Jing X Well was drilled to 1600m. The drilling fluid density was 1.17g / cm3, the viscosity was 47S, and the drilling displacement was 32L / s. Loss of return occurred. Multiple bridge plugging attempts were ineffective. When the on-site drilling pump was used to construct plugging slurry with a thickness of more than 1cm, equipment jams frequently occurred, making it impossible to construct centimeter-level high-solid plugging slurry.

[0073] After the equipment arrived at the well, it was assembled and tested for 56 minutes. 20m³ of clean water was added to the liquid storage tank, and the stirring system (mechanical stirring + pneumatic stirring) was started. After normal operation, the liquid inlet pipeline and the pipeline gate output to the liquid storage tank were opened, and the mixing funnel 1 was started. First, 4% white clay was added to the clean water. Using the cantilever crane 3, 2 tons of plugging materials with a particle size of 0.3-0.5cm were added to the mixing funnel 1 and the tank surface feeding port 6, and then 4 tons of plugging materials with a particle size of 1cm-2mm were added. Finally, 2 tons of plugging materials with a particle size of 2cm-3cm were added. The equipment operated normally and the slurry preparation time was 1.2h. After the plugging slurry was prepared, the liquid inlet pipeline and the output pipeline gates were opened, and the continuously variable output pump 7 was started. The displacement was controlled at 18L / s. The equipment operated normally and it took 27 minutes to pump in 25m³. After the construction, there is 0.5m³ plugging slurry in the tank that cannot be sucked in. The residual plugging slurry is discharged by opening the drain valve, and 1m3 of clean water is put into the tank to stir and clean the storage tank and equipment. Then the plugging is successfully completed in one go through the follow-up construction. Field application analysis: The well leakage construction containing 0.5mm, 40% plugging slurry shortens the slurry preparation time by 3h, reduces the amount of plugging slurry by 12 cubic meters, and reduces the plugging material by 4.8 tons, which greatly improves the preparation and pumping time of plugging slurry and reduces the plugging cost. It has been applied on site for 30 wells, and all functional uses have been realized, meeting the construction needs of multiple types of plugging slurry on site.

[0074] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are identical or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A centimeter-level high solid phase plugging slurry mixed transportation plugging equipment, characterized in that: It includes a slurry preparation system, a stirring system, a liquid storage tank, an electric control cabinet and a pumping system installed on a skid-mounted base. The slurry preparation system, the liquid storage tank and the pumping system are all connected. The stirring system is arranged in the liquid storage tank. Bag breakers are arranged above the slurry preparation system and the liquid storage tank. The stirring system includes a mechanical stirring device and a pneumatic stirring device, and the slurry mixing system, stirring system and pumping system are all connected to the electric control cabinet by electrical signals; The pumping system comprises a continuously variable speed output pump and a motor, wherein the motor is fixed on the upper part of the continuously variable speed output pump, and the valve of the continuously variable speed output pump is spherical.

2. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 1 is characterized by: The slurry mixing system includes a mixing pump and a mixing funnel, the mixing pump is connected to the mixing funnel, the mixing pump is connected to the liquid storage tank through a funnel suction pipeline, the funnel suction pipeline is arranged at the bottom of the liquid storage tank, the outlet of the mixing funnel is respectively connected to the funnel output pipeline and the perfusion pipeline through a three-way valve, the funnel output pipeline is arranged in the middle of the top of the liquid storage tank, the perfusion pipeline is connected to the pumping system, the pumping system is connected to the liquid storage tank through the output pump suction pipeline, and the output pump suction pipeline is arranged at the bottom of the liquid storage tank.

3. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 1 is characterized by: The mechanical stirring device is an adjustable speed stirrer, and the pneumatic stirring device includes a hose, an in-tank air pipeline line 1 and an in-tank air pipeline line 2. The in-tank air pipeline line 1 is circumferentially arranged along the inner wall of the liquid storage tank, and a plurality of three-way valves are evenly distributed on the in-tank air pipeline line 1. The outlet of the three-way valve is connected to the in-tank air pipeline line 2. The in-tank air pipeline line 2 corresponds to the in-tank air pipeline line 2 in one to one. One end of the hose is connected to the in-tank air pipeline line 1, and the other end of the hose is connected to an air compressor.

4. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 1 is characterized by: The liquid storage tank has a conical inclined surface symmetrically arranged along the axis, and the space between the conical inclined surface and the tank body is filled with weighted sand. The tank surface of the liquid storage tank adopts a polyurethane grid and is equipped with a liquid level scale.

5. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 2 is characterized by: The continuously variable speed output pump and the liquid storage tank are communicated with each other through an output pump suction pipeline.

6. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 4 is characterized by: A ladder is installed on the side of the liquid storage tank, a steel plate support beam is provided on the top of the liquid storage tank, a guardrail is provided on the steel plate support beam, and a cantilever crane is provided on one side of the slurry mixing system.

7. The centimeter-level high solid phase plugging slurry mixed transportation plugging equipment according to claim 1 is characterized by: The valve body is made of wear-resistant, pressure-resistant and rigid material, and the valve seat is made of highly elastic and wear-resistant polyurethane material.

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